Locomotive exhaust nozzle



Oct. 23, 1923.

v E. B. BARR LOCOMQTIVE EXHAUST NOZZLE- Edward 3477) Patented @et. 23, 19 23.

EDYJARD B. BARR, OF'NE'WTON, KANSES, WARI-ZURST, 0. 3 N

LOCOIvIGTIVE EX ASSEGNQE GE ONE-HALF TO GEORGE Eli/TON, KANSAS.

Hausa NOZZLE.

Application filed August 24, 1921. Serial No. 495,135.

To all whom it may concern:

Be it known that I, EDWARD B. BARR, citizen of the United States, residing at Newton, in the county of Harvey and State 5 of Kansas, have invented certain new and useful Improvements in Locomotive Ex haust Nozzles, of which the following is a specification.

This invention relates to an exhaust nozzle for locomotives and has as one of its principal objects to provide a device of this character which will, as compared with an ordinary nozzle, operate to increase the partial vacuum in the smoke box of a loco-- motive.

A further object of the invention is to provide a nozzle which will, with marked efficiency, induce a discharge of smoke box gases through the smoke stack to thus decrease, as compared with an ordinary nozzle, back pressure in the locomotive cylinders.

And the invention has as a still further object to provide a nozzle which may be employed in connection with practically any ordinary locomotive. 7

Other and incidental objects will appear hereinafter.

I in the drawing:

Figure 1 is a fragmentary vertical sec tional view showing my improved exhaust nozzle in connection with an ordinary locomotive.

Figure 2 is a fragmentary longitudinal section particularly illustrating the screens employed in connection with the nozzle, and

Figure 3 is a perspective view showing the nozzle in detail.

Referring now more particularly to the drawing, I have, for convenience, shown my improved nozzle in connection with an ordinary locomotive having a saddle 10 upon which rests the locomotive smoke box 11. The saddle is provided with the usual exhaust cavities 12 through which the exhaust steam from the cylinders of the locomotive discharges, as will be well understood, and extending into the smoke box is the customary stack 13. In carrying the invention into effect, I employ an outer shell 14 which is tapered toward its upper end while the lower end portion of said shell is flattened and formed on the shell at its lower end is a base plate 15 by which the nozzle is pressure in the engine cylinders.

bolted or otherwise secured to the saddle 10 of the locomotive to communicate with the exhaust cavities 12. Extending within the shell axially thereof is a flue pipe 16 of a uniform diameter somewhat less than the minor diameter of the shell and defining steam passage 17 thereabout between the pipe and said shell. At its upper end the pipe 16 extends above the shell while at its lower end said pipe is formed with oppositely directed lateral branches 18 opening through the flattened sides of the shell near its lower end. These branches may be cast integral with the shell or otherwise secured thereto for sustaining the flue pipe within the shell and overlying said branches are screens 19 suitably secured to the shell, In conjunction with the nozzle 1 preferably employ a screen 20 which extends within the smoke box 11 beneath the inner end of the stack 13 and receives the nozzle therethrough, this screen being provided, of course, to prevent discharge of .cinders throu h the stack. Formed on the shell at it upper end is a flange 21 and bolted or otherwise secured to said flange is the base flange of a tip 22 surrounding the upper end portion of the flue pipe 16 and terminating flush therewith.

ikS will now be readily understood in view of the preceding description, the discharge of exhaust steam from the cavities 12 through the passage 17 of the shell will set up a draft through the flue pipe 16 so that smoke box gases will be drawn in through the branches 18 of said pipe from thesmoke box and discharged along with the exhaust steam through the locomotive smoke stack. As will be seen, all of the exhaust steam will be directed within the shell to discharge in a thin sheet encircling the mouth of the flue pipe. Accordingly, the force of the exhaust steam, as it rushes through the passage 17, will be utilized in maximum degree to cause a suction through the flue pipe and consequent suction within the smoke box tending to draw the gases therefrom. A proportionately increased volume of smoke box gases will accordingly be drawn from the smoke box and expelled through the stack for thus creating a maximum partial vacuum in the smoke box and, indirectly, proportionately reducing back I accordingly provide a particularly effective device for the purpose set forth and a device which may be readily applied to supplant the customary locomotive exhaust nozzle.

Having thus described the invention, What is claimed as new is:

In a locomotive exhaust nozzle, the combination of a cylindrical shell provided at its lower end portion with oppositely disposed flattened sides and formed internally REWARD B. BARR. Ii 5. 

